Decision Making Matrix

1
Decision Making Matrix
Taking a Close Look at Preliminary Ideas
Developed by Project Lead the Way
2
Develop a Decision Matrix
A decision matrix is used to compare design
solutions against one another, using specific
criteria that are often based on project
requirements.
3
Decision-Matrix (Pughs method)

• A weighted decision matrix

4
Design Selection Pughs Method

• The method is an iterative evaluation that
  quickly identifies the strongest design solution.
• Step 1 Select the Criteria for Comparison
• The list of criteria must be developed from the
  customer needs and engineering specifications.
  All team members should contribute in making the
  list.

5

Design Selection Pughs Method

• Step 2 Select the Design Solutions to be
  Compared
• The alternative design solutions should be those
  that proceed from the brainstorming.
• Step 3 Generate the Score
• A favorite design solution should be selected as
  a datum. All other designs are compared to it
  relative to each customer needs. For each
  comparison, the concept being evaluated is judged
  to be either better than ( score), about the
  same (s score), or worse than the datum (-
  score).
• Numeric scores can also be used.

6
Design Selection Pughs Method

• Step 4 Compute the total score
• Three scores are tallied, the number of plus
  scores, the number of minus scores and the total.
• If most designs get the same score on a certain
  criterion, examine that criterion closely. More
  knowledge may have to be developed in the area of
  the criterion.

7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
Numeric Scores Can Be Used
A numeric scale can be developed to assign values
for each criteria category.
11
Numeric Rankings
12
Identifying Criteria
13
Other Types of Criteria
14
The Right Decision
Design decisions should be based on analysis and
logic not personal opinion. A decision matrix is
a design tool that may be used multiple times
throughout a design process.